C Si 
 1.0000000000000000
     3.0830003376439352    0.0000000000000000    0.0000000000000000
    -1.5415001688219676    2.6699566122756493   -0.0000000000000000
     0.0000000000000000    0.0000000000000000    5.0345184695751390
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000154150026  1.7799710837502880  2.5197764940631728   T   T   T
  1.5415001534069661  0.8899855463250719  0.0025172592756022   T   T   T
 -0.0000000154150026  1.7799710837502880  4.4077209200722214   T   T   T
  1.5415001534069661  0.8899855463250719  1.8904616852846512   T   T   T